fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-xtensa / pgalloc.h
blob3e5b5652510239b081db16e3f54102289bee6cdd
1 /*
2 * include/asm-xtensa/pgalloc.h
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * Copyright (C) 2001-2007 Tensilica Inc.
9 */
11 #ifndef _XTENSA_PGALLOC_H
12 #define _XTENSA_PGALLOC_H
14 #ifdef __KERNEL__
16 #include <linux/highmem.h>
19 * Allocating and freeing a pmd is trivial: the 1-entry pmd is
20 * inside the pgd, so has no extra memory associated with it.
23 #define pmd_populate_kernel(mm, pmdp, ptep) \
24 (pmd_val(*(pmdp)) = ((unsigned long)ptep))
25 #define pmd_populate(mm, pmdp, page) \
26 (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
28 static inline pgd_t*
29 pgd_alloc(struct mm_struct *mm)
31 return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
34 static inline void pgd_free(pgd_t *pgd)
36 free_page((unsigned long)pgd);
39 /* Use a slab cache for the pte pages (see also sparc64 implementation) */
41 extern struct kmem_cache *pgtable_cache;
43 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
44 unsigned long address)
46 return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
49 static inline struct page *pte_alloc_one(struct mm_struct *mm,
50 unsigned long addr)
52 return virt_to_page(pte_alloc_one_kernel(mm, addr));
55 static inline void pte_free_kernel(pte_t *pte)
57 kmem_cache_free(pgtable_cache, pte);
60 static inline void pte_free(struct page *page)
62 kmem_cache_free(pgtable_cache, page_address(page));
65 #endif /* __KERNEL__ */
66 #endif /* _XTENSA_PGALLOC_H */